用于电动和混合动力交通工具的功率模块

对减少二氧化碳排放的急迫呼吁已使主要的汽车制造商致力于开发新的电动和混合动力驱动交通工具解决方案。为了为这些应用开发功率半导体模块,需要新的模块集成和封装解决方案。然而,只有选择正确的组件、开发具有创新性的方案和技术并对热和电气特性进行优化,才能实现相互冲突的需求,即低成本下最大功率密度、效率和可靠性。     

转换器设计用在线式免费仿真软件——SemiSel

许多电力半导体厂商都以软件或计算工具的形式为其产晶提供支持服务，SEMISEL是目前同类免费工具中最完备的一款，是用于损耗、散热设计及电力电子器件最优选塑的在线式计算仿真工具。可用于研究各种电力电子电路在不同运行条件下的特性及表现。本文介绍TSEMISEL仿真软件的特点、应用方法及其仿真实例。     

用于电动和混合动力交通工具的功率模块

为了开发新的电动和混合动力驱动交通工具需要的功率半导体模块，要有新的模块集成和封装解决方案。文章介绍了SKiM功率模块，是采用无基板压接触点的模块，确保了出色的热循环能力和低的热阻。     

Air stripping – a method for treatment of wastewater

During recent years the air stripping process has been increasingly applied to the cleaning of water contaminated by volatile organic compounds (VOC). The present contribution compares various methods of treating VOC-contaminated water, with a special focus on removal efficiency and economic aspects. In particular, air stripping, a universally used cleaning method, is described in greater detail. Design and operational aspects are worked out for packed stripping towers for the special case of water contaminated with chlorinated hydrocarbons. Experimental results substantiate predictions of various operating conditions, packing types and scale-up effects.     

Nichtbiologische Reinigung organisch verschmutzten Wassers

Non-Biological Removal of Organic Pollutants from Water . Contaminants present in waste water, seepage water and ground water include salts, heavy metals and organic compounds of low biodegradability. This paper considers the wide range of physico-chemical processes available for separation of such compounds from water and points out their optimal and economic range of application. Main subjects are desorption processes (air/steam stripping), adsorption processes (activated carbon, polymeric resins) and membrane separation processes. Alternative water treatment technologies (evaporation, distillation, liquid-liquid-extraction, oxidation, flocculation and precipitation) and combined processes are presented and discussed.